Toolbar for a user interface on a display screen



The FIGURE is a front view of a toolbar for user interface on a display screen showing our new design.

The outer rectangular broken line illustrates the unclaimed display screen and is included for the purpose of illustrating unclaimed environment and forms no part of the claimed design. The inner rectangular broken line illustrates the unclaimed software application environment and is included for the purpose of illustrating unclaimed environment and forms no part of the claimed design. The broken line text on the claimed design is included for the purpose of illustrating unclaimed portions of the toolbar for user interface on a display screen and forms no part of the claimed design. 

The ornamental design for a toolbar for a user interface on a display screen, as shown and described. 